[XERCESC-858] multiple layers of entities

• Type: Bug
• Status: Closed
• Resolution: Fixed
• Affects Version/s: 2.2.0
• Fix Version/s: 2.3.0
• Component/s: DOM
• Environment: Operating System: Linux; Platform: PC
• Bugzilla Id: 18842
• Assignee: Unassigned
• Reporter: Stefan Roiser
• Created: 09/Apr/03 14:50
• Updated: 12/Mar/18 03:51
• Resolved: 09/Apr/04 16:34

Description

Parsing of documents with multiple layers of entities result in a wrong
DOM-tree. E.g. when parsing the following "MyDoc.xml" and its dependent
documents with XERCES 2.2.0

MyDoc.xml:
----------
<?xml version="1.0" standalone="yes"?>
<!DOCTYPE mydoc [
<!ELEMENT mydoc (elem1, elem2)>
<!ELEMENT elem1 (onlyonce)>
<!ELEMENT elem2 (onlyonce)>
<!ELEMENT onlyonce EMPTY>
<!ENTITY Elem1 SYSTEM "Elem1.xml" >
<!ENTITY Elem2 SYSTEM "Elem2.xml" >
<!ENTITY OnlyOnce SYSTEM "OnlyOnce.xml" >
]>
<mydoc>
&Elem1;
&Elem2;
</mydoc>

Elem1.xml:
----------
<elem1>
&OnlyOnce;
</elem1>

Elem2.xml:
----------
<elem2>
&OnlyOnce;
</elem2>

OnlyOnce.xml:
-------------
<onlyonce/>

the resulting DOM-tree will look like:

[...]
<mydoc>
<elem1>
<onlyonce/>
</elem1>
<elem2>
<onlyonce/>
<onlyonce/>
</elem2>
</mydoc>

In <elem2> the element <onlyonce> appears twice while it should be there
only once. An <elem3> would appear 3 times and so on ....

I looked up the XML-specifications of the W3C and could not find a hint
that multiple layers of entities are forbidden by the language.
Additionally Xerces-C 1.6.0 parsed the document correctly. So I consider
this to be a bug of the new parser.

Cheers

Stefan